Air-heating stove



(No Model.) v

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- AIRIHBATING STOVB. i* N0.v374,896. Patented Deo. 13, 1887,

N. PETERS, PhourLilhughplmr, wgshiigwn D c UNITED STATES PATENT Ormes.

MILTON C. GREEN, OE KANSAS CITY, MISSOURI, ASSIGNOR TO HIMSELF AND LEVI H. OSBORN, OE GARNEIT, KANSAS.

AIR-HEATING STOVE.

SPEOIPICATEON forming part o1' Letters Patent No. 374,896, dated December 13,1188?.

Application filed March 25, 1887.

- Kansas City, Jackson county, Missouri, have invented certain 'new and useful Improvements 1n Air-Heating Stoves, of which the vfollowing is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming a part hereof.

, My invention relates to anv improvement in heatingstoves, and more particularly to that class ot'hot-air heaters in which-the dame and products of combustion are passed in proxlmity to a chamber constantly supplied with cold air, which, as it becomes heated, is allowed to pass out into the room.

rlhe object of my invention is to provide a cheap durablehot-air heater which shall be capable of evenly heating more space in less time and with less fuel than the heating-stoves heretofore in use; and my. invention consists in certain novel features of construction and combinations of parts, as will be more fully described hereinafter, and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a perspective View of my improved heating-stove and attachment, with the surrounding shells partially broken away to show the interior and the damper removed; Fig. 2, a vertical section of the same, and Figs. 3, 1i', and 5 modifications.

Theletter E represents a suitable base provided with legs or supports in the usual manner. The base E surrounds and supports the ash-receptacle P and the grate P', and is pro'- vided with a iiange or casting, B', which is provided with a series of apertures, b, and it can be cast integral with the base E or cast separately and afterward securely fastened thereto. l

B and A represent the inner and outer shells of the stove-body or fire-box,which are seeurel y fastened at their lower ends to the iiange or `casting B' and at their upper ends to the top casting, A', in such a manner that aspace will be left between the surfaces of the shells wide enough to admit a free circulation of air through the apertures b in the lowersupporting-casting, and thence through the space between the shells and out at apertures c in the top casting, A.

Serial No. 232,382. (No model.)

.'The hot-air chamber or shell C is provided t with an opening in its top, which is surrounded by the iiange M, having its upper edges secured around. the edges ofthe aperture in the top casting, A', and its lower edge around an aperture in the top of the shell C, so that there will 4be no communication between the air in the cone-shaped shelll C and the flames and products of combustion within the stove.

The. hot-air shell is supplied with outside cold air through the medium of the -cold-air lues G G', which pass from under the ash-receptacle and the base E up through the iirebox and thence diagonally across to the lower extremity of the hot-air chamber. These coldair lues as they enter the fire-box gradually increase in diameter as they approach the hotair chamber, thereby causing the air to iiow swiftly and freely into the hot-air shell by allowing for its expansion as it becomes more and more heated.

Located in and extending through the center ofthe hotair shell C is a fuel-magazine, D, the lower part of which passes through the apex of the cone-shaped shell and opens into the iire-boX, and its upper end passes through the opening in the top ofthe air-shell and eX- tends through the aperture in the top casting. As the sides of the magazine pass through the opening in the top casting they are made to diverge, thus increasing the diameter of the top or mouth thereof, so that when the magazine is being iilled the fuel will not fall over the edge into the hot-air chamber.

I`he fuel-magazine is provided with an outer shell, D', which is secured so that an airspace will be formed between the hot air in the shell C and the fuel in the magazine, thus keeping the fuel from becoming heated f and ignited within' the magazine.

The magazine isv provided with a suitable roo cover, 6, adapted to tit tightly over the top kindled in the fire-box the flame and heated products of combustion, passing up, around, and over the cone-shaped airshell, will heat the air within said shell, causing it to expand and pass out through the apertures in' the top casting, A', which causes cold air to constantly fiow in through the funnel shaped cold-air tlnes to prevent a vacuum being formed within the airvshell, thereby keeping up a steady circulation of air from the door up through the stove, where it becomes heated, out into the room again. This steady current of cold air throiigh the dues G G/ also keeps them from burning out,7 which would otherwise soon be the case, owing to their close proximity to the intense heat ofthe lire. As the flames and heated products of combustion iow up the sides of the conical shell C, they are deflected against the inner sh ell of the tirebox by reason of the sloping sides of the inverted cone, thus doubly heating the air within the space B2 between the two shells and causing it to rise and flow upward out into the room while the space is supplied with 4cold air through the apertures in the lower supportingcasting. l

The radiated heat from the sides of the stove would be intense and unpleasant, as the sides of the cone deflect the heat so strongly against the inner shell, were it not for the fact that the outer shell is provided, and consequently the airspace is formed, to obviate this great disadvantage, thus allowing the heated air to pass up and out at the apertures a, instead of being radiated directly out from the sides of the stove.

It is evident that my hotair shell, having the downwardly-converging sides provided with c0ld-air fines and having its top in communication with the outer air, can be used in many different styles and forms of stoves and heating-drums. For example, Fig. 3 shows the hot-air shell, and dues applied to a heating-drum in which the magazine is dispensed with and the heated air is allowed to flow out through the iues C C while cold air is supplied through the iiues G G, the dame and heated products of combustion passing directly from the ire-box through the opening L into the drum.

It is also evident that many changes can be made in the form of the hot-air shell, as illustrated by Figs. 4t and 5, which are a perspective and sectional view of a horizontal stove adapted to burn wood, in which are located two or more hot-air shells provided with the downwardlyconverging sides, said shells being communicating and adapted to rest one on the other, the cold air being supplied through iiues G Gr Gr2 G3, while the air as it becomes heated passes through the bottom of the lower shell into the upper one and out into the open air through the slot Lin thetop of thc stove and uppermost hot-air shell.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a heating-stove, the combination ofthe usual shell, B, the conical hotair shell C, suspended within said shell B directly over the firepot and having its upper portion in communication with the outer air, and cold-air fines extending from the open air beneath the stove into the lower portion of said coneshaped shell, the diameterof said iues gradually increasing as they approach the hot-air shell, substantially as described.

2. In a heating-stove,the combination ofthe outer shells, A B, a conical hot-air shell suspended within said shells directly over the tire-pot and having an openingin its top portion, a flange, M, secured to said hot-air shell and surrounding said opening therein, and also being secured to the top A, and cold-air fiues having one end open to the air beneath the stove and the opposite ends passing upwardly through the Iire-box and opening into the lower portion of said hot-air shell, the diameter of said iiues gradually increasing as they approach said coneshaped shell, sub. stantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

MILTON C. GREEN.

Vitnesses:

TuoMAs A. HARRIs, JOHN I. HAY.

IOO 

